Chem Flashcards
Atomic Number = what?
Number of protons in the nucleus
What is the smallest part of an atom
Electron
Periods go down or across?
Across
What do periods signify?
Amount of electron clouds
Groups go across, true or false?
False, they go down
What does the group number mean?
The amount of electrons in the valence shell
What is the valence shell?
The outer most electron shell which has electrons in it
What groups are the most reactive?
1 and 7 because they want to either always gain or loose 1 electron
Co valent bonding occurs between what?
Two non metals
Ionic bonding occurs between what?
One metal (cation) and one non metal (anion)
What’s a common ionic bond?
Salt
Metallic bonds are special because?
The valence shell electrons drop off and form a free electron sea where the atoms bounce freely
What order do normal electron clouds go in?
2,8,8,32
What order do transition metal electron clouds go in?
2,8,18,32
Atomic weight = what?
Number of Protons + Neutrons